<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div {
            font: 100px/200px "微软雅黑";
            text-align: center;
            color: #000;
            text-shadow: 0 0 0 rgba(0, 0, 0, 1);
        }

        div:hover {
            color: rgba(0, 0, 0, 0);
            text-shadow: 0 0 100px rgba(0, 0, 0, 1);
            transition: 3s;
        }
    </style>
</head>
<body>
<div>lang</div>
</body>
</html>